\(12\cdot\left(-47\right)+12\cdot\left(-19\right)+\left(-66\right)\cdot88\)
\(=12\left(-47-19\right)+\left(-66\right)\cdot88\)
\(=-66\cdot12+88\cdot\left(-66\right)\)
\(=-66\left(12+88\right)\)
\(=-66\cdot100=-6600\)
Đúng 1
Bình luận (0)